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# Questions tagged [generator]

A generator is a device that generates electricity from mechanical energy via different energy sources such as heat or kinetic energy of water.

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84 views

### How much power do power stations in parallel supply?

In modern power systems, the power is supplied by effectively connecting multiple generators in parallel. However, not all these generators are equal, some stations supply more power than others (I ...
135 views

### Build a simple coil generator

I know that if I want to create a powerful electromagnet, then I'd better put a ferromagnetic material inside the coil I build. So I was wondering if the same applies in the inverse scenario, that is ...
178 views

### What makes the generator practical?

"A student tried to make an AC generator consists of a coil of one turn, and cross sectional area of (7.54 × 10^-3 m²), and rotates in magnetic flux density (2.5 × 10^-2 T), and when it was taken out ...
466 views

### Methods for measuring cable path loss in RF Testing

I have been reading about various methods to perform a Cable Path Loss for RF Testing but not being a core RF person, I needed some insights on how it is done in Field or Lab. Here is my understanding ...
108 views

### wind generator for electronic devices

I'm trying to run a mini project about wind generator for charging electronic devices(smartphones, mp3 player, powerbank, etc). Rough project description; I want to have several usb ports and the ...
128 views

### Can I put graetz circuits' outputs in series and parallel?

I will have multiple coils that generate alternate current. Those coils are placed around a wheel which has some magnets on it. My current plan is to make it look like this: I was considering ...
107 views

### Can a generator have the coil oriented around the rotational axis?

I see a lot of examples of simple science fair generators with the coil axis perpendicular to the rotational axis of the magnets. I have made one with the coil wrapped around the axis of rotation, but ...
680 views

### Charging ultracapacitors separately and using them in series for regen braking system

I am a mechanical engineer therefore please correct me if there is anything that I got wrong. I am working on a regenerative braking system for an IC motorcycle and I am looking for the best way to ...
315 views

### Generate electricity, water wheel

I have a stream of water, it flows at 1 gallon per minute into a water wheel. The water wheel produces about 75lbs of torque. How much electricity can I make with this? Where can I get more info on ...
136 views

### Systematically, what would happen if I give a crank at the shaft of a motor?

In particular, I would like to know what would happen if I crank the shaft of the following kinds of motor: brushed DC, brushless DC (the kind used in computer fans now) and 6-coil 3-phase AC ...
696 views

### Generating electricity by moving door handle to produce 3 Watts?

I want to attach a generator to a door handle and have the output charge a battery. My system needs to provide about 3 Watts. A similar question was asked here and I referenced it to get an idea of ...
152 views

### Practicality of a sound based electrical generator

I am wondering:- Numerous electrical generators have been designed for every type of renewable energy I can think of; we have solar panels, hydroelectric dams and wind turbines, to name a few. ...
1k views

### 3 Phase Motor Rectifier

I have a Turnigy Rotomax 50cc engine and I am trying to rectify it. I don't know whether it has delta or a wye winding style but I suspect that it is delta(Left Picture). This is what I have so far: ...
2k views

### How does one estimate the electrical power of a power plant?

I've asked several people how a power plant creates power (i.e. currents and voltages) and I found that they were unsure. In addition, I’ve done several searches to get more information, and I was not ...
260 views

### How can I add white noise to a low-noise 2 Mhz sine signal from the signal generator?

I want to add a defined level of noise to a low-noise/exact signal generator which produces around 2 Mhz. I heard Zener diodes should be good for that job. But how can I get a defined level of noise ...
56 views

### Magnetic induction with varying rpm: Dealing with excess energy

I would like to get some advice regarding the following scenario: I want to build a cheap, small generator for an energy harvesting application. There are magnets on a rotating shaft and off-the-shelf ...
49 views

I am doing an experiment that involves loading an asynchronous 50 HZ generator. For the load to consume current it has to be a capacitive load to cause a phase shift between the current and the ...
226 views

### DIY rotary inverter technical and economical feasibility

I’m setting up a solar panel system (200W) that’s used to charge batteries that will power small appliances in a converted van. Solid state inverters are expensive and difficult to fix and it seems ...
177 views

### Synchronous generator induced EMF

I have started studying synchronous generators in more detail of recent and I'm finding it difficult locating helpful information regarding their operation. What is the formula that can be used to ...
61 views

### Limiting the speed of an induction generator

A turbine (whose angular speed must not exceed $\omega_{max}$) is driving a 3-phase induction generator. I envisage the generator's electrical output being monitored by a circuit that reacts to ...
82 views

### In a Generator, why when the Exciter voltage increases the Generator Voltage decreases?

I have a project where I have to build an electrical model of a generator with constant torque at 1500 RPM and simulate it in LabView. I have a manual that describes some measurements that were made ...
5k views

### How does the speed of a synchronous generator changes with load?

When the generator is rotating at rated speed and let us say that the load decreases then the mechanical torque will be more than​ the electrical torque which will lead to increase in the speed of ...
163 views

### Are electromechanical oscillators still in use? Or totally obsolete?

An electromechanical oscillator is basically an AC generator that has a much wider frequency range. I read something on a wikipedia article about a radio frequency AC generator used for military radio ...
438 views

### How Armature reaction is different from Self inductance?

It was given in "Electric machinery Fundamentals" by Stephen J. Chapman book that Armature reaction and self inductance is different. Contribution from armature reaction is considered as voltage drop \...
54 views

### Increasing current draw of generator receptacles within total generator head rating

I am looking at a generator that is rated for 2600 watts, total current draw 25 amps. It is currently set up with two hot lines separately connecting to a duplex receptacle rated for 15 amps and ...
8k views

### What is actually meant by “parallel paths” in a simplex progressive lap winding of a DC Generator?

Many of my textbooks mention "parallel path" term, but I am unable to actually understand it. Also along with this it would be quite helpful to know, how the polarity of brushes is determined?
1k views

### How to make a simple manual gengerator that can produce a 9 volts of electricity?

I have a project from my subject which that project was to create a manual generator that can produce up to 9 volts of electricity. I've been searching some samples that is homemade manual generators, ...
99 views

### High voltage step up power module

I have bought the stuff in the image below from eBay in order to generate an electrostatic field. But the spec of the item is, well ..., written in chineese with some english flavor. I have tried to ...
756 views

### Inverter Generator Watt Question

I'm not sure how to search this so hopefully someone will answer. I'm rigging a floundering boat for my son and want to use LED light bars on the front and sides. I want to power then with an inverter ...
649 views

### Limit voltage/current of bridge rectifier

Assume I have a small bicycle generator which usually feeds the front and back LED/light bulbs. Powering a small gadget from this generator should well be possible. The setup would involve a full-...
132 views

### Wind turbine design question

I am planning to design a wind turbine that is has rotor blade radius of 0.915m and is connected to a generator. The generators specifications are, it is an ac generator with 5000 coil turnings and a ...
3k views

### switching DC trolling motor to generator

Would like to drag the trolling motor prop while sailing to re-charge the battery. The trolling motor is 12 VDC and the max amps at full forward speed is 50. The sailing speed of the boat will turn ...
88 views

### Builing a frequency inverter chimera

Industrial frequency inverters (or "variable speed drives") can be thought in three parts: A mains rectifier, that converts two- or three phase input current to DC, a DC energy storage (large ...
255 views

### Does a Wimshurst machine work fine with normal glass disks?

I want to build my own Wimshurst machine and I cannot find plexiglass disks. However, in our town there is somebody that cuts normal glass circles–so I wonder if normal glass disks would replace ...
332 views

### Is my dynamo a BLDC generator or PMSM generator?

I want to ask you about a problem please. I have bought an AC dynamo generator (the commercial name). First I don't know is it an AC synchronous generator or a BLDC generator. The dynamo has 12 ...
459 views

### Factors determining number of turns in field winding of Sychronous generator

the question is simple, based on what factors do I choose the right number of turns in field winding (for synchronous generator)? It seems like the less turns there are, the more DC current is needed ...
567 views

### charging an auto battery for a gate opener?

Commercial gate opening systems use solar recharging systems frequently. My location is inappropriate for solar but is right next to a small stream. What properties of a mini hydro generation would be ...
4k views

### A simple pulse generator

Basically, I want a minimalistic pulse generator. I guess I've always like the idea of Avalanche Breakdown to do this. I was trying to do this by using 2N2222's in reverse breakdown mode, link here, ...
167 views

### Building a micro generator, I need to account for the pulsing DC after my 3 phase diode bridge

I wound my own motor, and tested it to be about 300 RPM per volt, and if my noob math is right, it should be able to handle about 1600 watts with a ~40 volt supply without burning my nice but thinly ...
2k views

### Charging a battery with two sources, should I put them in series or parallel?

I would like to charge a battery using two sources (solar and a generator), should I put the two sources in series or parallel before the battery? The battery is actually 3 batteries in series. Each ...
28k views

### How is generator output voltage kept constant?

I read that if we increase the load at the terminals of a generator, the current driven from the generator will increase which will slow down the generator. But for this to happen the generator should ...
2k views

### 5 volt generator

first time question, and not much of an electrical guy. so please be patient. My dad however, is an electrical engineer, who loves little goofy gadgets as most engineers do. For Christmas I want to ...
277 views

### Magnet strength in dynamo design

I come from a computer background, and apologies if this question sounds elementary. While designing a dynamo, I came across a problem of how to calculate the the strength of the magnetic field, and ...
2k views

### DC shunt generators problem

One of the questions in my book goes like this... 'A shunt generator delivers 450 Amps at 230 volts...'. The resistance of the shunt field, armature and brush contacts are given. I get that the 450 ...
1k views

### DC motor spun clockwise then counter clockwise creates AC current?

I am making a generator with a DC motor but the style of turning the rotor would be clockwise and then counter-clockwise, and I would want to capture as much current as possible so I hope it could be ...
1k views

### Switch mode power supply connected to the diesel generator makes bad voltage oscillation

GEKO diesel generator has 60 kVA electric power. Our switch mode power supply connected to this generator via passive filter DL-50EA3 and 6-pulse bridge rectifier (see the schematic). In this ...
2k views

### DC motor as a generator: characteristics

I am using a DC motor as a generator for my small toy/experiment. The problem is that the motor/generator can not provide enough counter EMF or torque or whatever the correct word is. So the rotor on ...
2k views

### One shot pulse generator (5ns)

I tried looking and I found that DS1040 capable to generate one shot 5ns but the component already obsoleted. Is that any replacement part for DS1040 or any others IC with same features? Datasheet: ...